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<h2><b>log10</b></h2><p> 

<code>log10(<i>expr</i>) </code><p>

Takes the logarithm base 10 of the expression. May be used with gridded or
station data. Values less than or equal to zero are set to missing in the
result. 
<H3>Usage Notes</H3><P>
<H3>Examples</H3><P>
